Cation exchange capacity and mineralogy of loess soils with different amounts of volcanic ashes

Iturri, Laura Antonela; Buschiazzo, Daniel Eduardo

doi:10.1016/j.catena.2014.04.021

Cited by 32 publications

(20 citation statements)

References 27 publications

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“…The concentration of polycyclic aromatic hydrocarbons (PAH) in the <63 µm fraction of river sediments has also been shown to be higher than in the 1000-2000 µm fraction, indicating a higher sorption of PAH by fine particles [119]. Studies by Iturri et al [120] have indicated that the electrochemical properties of soils are not only contributed by the clay fraction, but silt particles, especially those with diameters between 2 and 20 µm, also play a major role as well. Silt fraction of soils contribute up to 17.5% of CEC to the total soil CEC [120].…”

Section: Fire-induced Changes In Soil Textural Properties and Implicamentioning

confidence: 99%

“…Studies by Iturri et al [120] have indicated that the electrochemical properties of soils are not only contributed by the clay fraction, but silt particles, especially those with diameters between 2 and 20 µm, also play a major role as well. Silt fraction of soils contribute up to 17.5% of CEC to the total soil CEC [120]. Increased sand-sized particles in soils after fire events reduces the total soil surface area and surface charge density with a consequent reduction of their CEC.…”

Section: Fire-induced Changes In Soil Textural Properties and Implicamentioning

confidence: 99%

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Fire-Induced Changes in Soil and Implications on Soil Sorption Capacity and Remediation Methods

Ngole‐Jeme

2019

Applied Sciences

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Vegetation changes caused by fire events are visible instantly but changes in soils are less apparent, and could be short-term, long-term or permanent in nature. Research has shown that soils undergo changes in their mineralogical, geochemical, physico-chemical and biological properties after a fire event that may vary depending on the intensity and duration of the fire, and the properties of the soil. Some of these properties make significant contributions towards soil’s ability to sorb contaminants. Changes in these properties could affect soil sorption complex and the effectiveness of remediation methods used to clean these soils when contaminated. This review synthesizes available information on fire-induced changes in soil properties affecting soil sorption and the factors which dictate these changes. The implications of changes in these properties on the soil’s natural attenuation capacity and choice of remediation method to clean up fire-affected contaminated soils are also discussed.

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Section: Fire-induced Changes In Soil Textural Properties and Implicamentioning

confidence: 99%

Section: Fire-induced Changes In Soil Textural Properties and Implicamentioning

confidence: 99%

Fire-Induced Changes in Soil and Implications on Soil Sorption Capacity and Remediation Methods

Ngole‐Jeme

2019

Applied Sciences

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“…37,39,40 The predominance of one of these cations and the clay mineralogy will determine its properties, such as expansion and cation exchange. [36][37][38][41][42][43] Natural clays can be modified according to their cation exchange capacity (CEC), which is the quantity of exchangeable cations per dry weight. This exchange is of great interest because it alters the basal interplanar distance, enhancing the adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Smectite Clay Modified with Quaternary Ammonium as Oil Remover

Lira¹,

Silva²,

Filho³

et al. 2016

Journal of the Brazilian Chemical Society

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Clays such as smectite have high technical and economic viability due to their large adsorption capacity. These properties can be improved by treatment with acids or other modifications. This paper describes experiments to prepare and characterize organoclays and to evaluate their ability to remove oil from contaminated water in comparison with clay in its natural state. We used natural smectite clay from the municipality of Presidente Dutra, Maranhão State, modified with the quaternary ammonium salt cetyltrimethylammonium bromide. Characterization was performed by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray fluorescence, thermogravimetry and determination of surface area by the Brunauer-Emmett-Teller (BET) method. The results showed appropriate conditions of the organophilization process, indicating the intercalation of quaternary ammonium cations between the clay layers. The adsorption tests showed that the natural clay reduced the amount of oil contained in the aqueous medium by 76.16%, while the corresponding removal rates of all organoclays tested were above 92%, which makes them potentially applicable to remove oil from wastewaters.

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“…At larger scales, volcanic ash present in the atmosphere can affect solar radiation, and the nutrients contained in the ash can fertilize terrestrial and aquatic ecosystems far away from the source, contributing to carbon sequestration in biomass69. Recent research shows that the presence of volcanic ash can also affect important soil chemical properties10. However, knowledge of field conditions and wind erosion rates of fresh volcanic deposits is very limited11.…”

mentioning

confidence: 99%

Dynamics of volcanic ash remobilisation by wind through the Patagonian steppe after the eruption of Cordón Caulle, 2011

Panebianco

Méndez

Buschiazzo

et al. 2017

Sci Rep

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Wind erosion of freshly-deposited volcanic ash causes persistent storms, strongly affecting ecosystems and human activity. Wind erosion of the volcanic ash was measured up to 17 months after the ash deposition, at 7 sites located within the ash-deposition area. The mass flux was measured up to 1.5 m above ground level. Mass transport rates were over 125 times the soil wind-erosion rates observed before the ash deposition, reaching up to 6.3 kg m−1 day−1. Total mass transport of ash during the 17 months ranged between 113.6 and 969.9 kg m−1 depending on topographic location and wind exposure. The vertical distribution of the mass flux at sites with higher vegetation cover was generally inverted as compared to sites with lower vegetation cover. This situation lasted 7 months and then a shift towards a more uniform vertical distribution was observed, in coincidence with the beginning of the decline of the mass transport rates. Decay rates differed between sites. Despite changes over time, an inverse linear correlation between the mass transports and the mass-flux gradients was found. Both the mass-flux gradients and the average mass-transport rates were not linked with shear-stress partition parameters, but with the ratio: ash-fall thickness to total vegetation cover.

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Cation exchange capacity and mineralogy of loess soils with different amounts of volcanic ashes

Cited by 32 publications

References 27 publications

Fire-Induced Changes in Soil and Implications on Soil Sorption Capacity and Remediation Methods

Fire-Induced Changes in Soil and Implications on Soil Sorption Capacity and Remediation Methods

Smectite Clay Modified with Quaternary Ammonium as Oil Remover

Dynamics of volcanic ash remobilisation by wind through the Patagonian steppe after the eruption of Cordón Caulle, 2011

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